// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_FILTERS_VP9_UNCOMPRESSED_HEADER_PARSER_H_
#define MEDIA_FILTERS_VP9_UNCOMPRESSED_HEADER_PARSER_H_

#include "media/filters/vp9_parser.h"
#include "media/filters/vp9_raw_bits_reader.h"

namespace media {

class Vp9UncompressedHeaderParser {
public:
    Vp9UncompressedHeaderParser(Vp9Parser::Context* context);

    // Parses VP9 uncompressed header in |stream| with |frame_size| into |fhdr|.
    // Returns true if no error.
    bool Parse(const uint8_t* stream, off_t frame_size, Vp9FrameHeader* fhdr);

private:
    uint8_t ReadProfile();
    bool VerifySyncCode();
    bool ReadColorConfig(Vp9FrameHeader* fhdr);
    void ReadFrameSize(Vp9FrameHeader* fhdr);
    bool ReadFrameSizeFromRefs(Vp9FrameHeader* fhdr);
    void ReadRenderSize(Vp9FrameHeader* fhdr);
    Vp9InterpolationFilter ReadInterpolationFilter();
    void ResetLoopfilter();
    void SetupPastIndependence(Vp9FrameHeader* fhdr);
    void ReadLoopFilterParams();
    void ReadQuantizationParams(Vp9QuantizationParams* quants);
    int8_t ReadDeltaQ();
    uint8_t ReadProb();
    bool ReadSegmentationParams();
    bool ReadTileInfo(Vp9FrameHeader* fhdr);

    // Raw bits reader for uncompressed frame header.
    Vp9RawBitsReader reader_;

    Vp9Parser::Context* context_;

    DISALLOW_COPY_AND_ASSIGN(Vp9UncompressedHeaderParser);
};

} // namespace media

#endif // MEDIA_FILTERS_VP9_UNCOMPRESSED_HEADER_PARSER_H_
